Re: BUG #3542: Dropped and recreated columns have problems with NOT NULL contraints

What did you expect?

Jens Schicke wrote:
> pizza_de=# alter table store_flags add column flag integer;
> ALTER TABLE
> pizza_de=# alter table store_flags drop column flag;
> ALTER TABLE
> pizza_de=# alter table store_flags add column flag integer not null;
> ERROR:  column "flag" contains null values

The column was not added. It would've been filled with NULLs, which
would violate the NOT NULL constraint. You have to give a DEFAULT if you
add a column with a NOT NULL constraint.

> pizza_de=# alter table store_flags drop column flag;
> ERROR:  column "flag" of relation "store_flags" does not exist

The column doesn't exist, because the add column above failed, and was
rolled back.

> pizza_de=# alter table store_flags add column flag integer not null;
> ERROR:  column "flag" contains null values

Same as above..

--
  Heikki Linnakangas
  EnterpriseDB   http://www.enterprisedb.com